An analysis of the role of local fishermen in the conservation of the loggerhead turtle ( Caretta caretta) in Pontal do Ipiranga, Linhares, ES, Brazil (original) (raw)

2007, Biological Conservation

The role of researchers and fishermen in the clutch management of loggerhead sea turtles was evaluated for 10 nesting seasons at Pontal do Ipiranga TAMAR station, Linhares, ES. The comparison of nests transferred by researchers and locals (carebeiros) showed that clutches transferred by researchers presented higher clutch size. Clutch size between nests transferred by carebeiros and left in situ did not show significant differences. Hatching success was significantly higher for clutches left in situ than for those transferred to other places in the beach or to hatcheries. The clutches transferred exclusively by researchers achieved a higher hatching success than those transferred partially or totally by carebeiros. The relocation time of clutches collected by carebeiros and handed to researchers affected hatching success. It is recommended that clutches be left in situ, provided they have adequate conditions for monitoring, but careful clutch translocation, independent of the interval elapsed after laying, may also constitute a viable technique for the conservation of sea turtles in the region.

Sea turtle strandings and the importance of the restinga de Jurubatiba National Park in loggerhead (Caretta caretta) nesting sites

Nature and Conservation

Protected areas represent important refuges for several species of fauna, mitigating human impacts and providing food resources and reproductive sites. In this study, analyzed the stranding pattern of sea turtles and the importance of the largest restinga protected area in Brazil, the Restinga de Jurubatiba National Park, Rio de Janeiro, Brazil, as a potential nesting site for Caretta caretta. A total of 352 strandings were recorded from October 2017 to September 2020 by direct monitoring on the beaches. The species with the highest recorded stranding was Chelonia mydas (n = 146), followed by Lepidochelys olivacea (n = 100), Caretta caretta (n = 91), Dermochelys coriacea (n = 11) and Eretmochelys imbricata (n = 4). The highest number of stranding records occurred in the end of winter and during spring. A total of 223 nests were registered, mostly in spring and summer, with most records of C. caretta nesting between November and December. The occurrence of nesting in the park area de...

Assessing the efficacy of direct conservation interventions: clutch protection of the leatherback marine turtle in the Dominican Republic

Oryx, 2014

The beaches of Jaragua National Park in the Dominican Republic are the country's last known major nesting site for the leatherback marine turtleDermochelys coriacea. This nesting aggregation is threatened by widespread illegal egg take, and clutch relocation and artificial incubation have been carried out as protection measures since 1974. We assess the efficacy of such efforts and investigate how artificial incubation may be influencing the success and sex ratios of clutches. We compare hatching success, incubation duration and embryo mortality in in-situ clutches (n = 43) with those incubated artificially at sites in the east and west of the Park (n = 35 and n = 31, respectively). Our results show that in the west, artificial incubation significantly decreases hatching success in clutches. In the east the duration of incubation is increased, which we predict would result in an increase in the number of males from these clutches. Clutch relocation is currently the only viable c...

Loading...

Loading Preview

Sorry, preview is currently unavailable. You can download the paper by clicking the button above.